tjub:
Most people playing Kings of War or Vanguard might know this, but easy army.com provides a free army list builder. Including Magical Artifacts, Spells and rules.
Kings of War
Vanguard
boyfights:
Thanks for this, will be playing with it at work today hopefully 
I think I even still have an account from when I was looking at flames of war and bolt action!
Abecedar:
I use it a lot now. A few button clicks and you can switch things around to have a few different lists ready at hand